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Gao, CJ; Gong, Y; Wang, X; Chen, XL; Gao, CJ (reprint author), Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China.
Cosmological models with Lagrange multiplier field
Source PublicationPHYSICS LETTERS B
Language英语
KeywordHolographic Dark Energy Preferred-frame Theories Equation-of-state Relativistic Gravity Cosmic Acceleration Conservation Laws Universe Constant Quintessence Transition
AbstractWe first consider the Einstein-aether theory with a gravitational coupling and a Lagrange multiplier field, and then consider the non-minimally coupled quintessence field theory with Lagrange multiplier field. We study the influence of the Lagrange multiplier field on these models. We show that the energy density evolution of the Einstein-aether field and the quintessence field are significantly modified. The energy density of the Einstein-aether is nearly a constant during the entire history of the Universe. The energy density of the quintessence field can also be kept nearly constant in the matter dominated Universe, or even exhibit a phantom-like behavior for some models. This suggests a possible dynamical origin of the cosmological constant or dark energy. Further more, for the canonical quintessence in the absence of gravitational coupling, we find that the quintessence scalar field can play the role of cold dark matter with the introduction of a Lagrange multiplier field. We conclude that the Lagrange multiplier field could play a very interesting and important role in the construction of cosmological models. (C) 2011 Elsevier B.V. All rights reserved.
2011
ISSN0370-2693
Volume702Issue:41308Pages:107-113
Subject AreaPhysics
Indexed BySCI
Funding OrganizationNational Science Foundation of China [10533010, 10575004, 10973014]; 973 Project [2010CB833004] ; National Science Foundation of China [10533010, 10575004, 10973014]; 973 Project [2010CB833004] ; National Science Foundation of China [10533010, 10575004, 10973014]; 973 Project [2010CB833004] ; National Science Foundation of China [10533010, 10575004, 10973014]; 973 Project [2010CB833004]
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/14291
Collection理论物理所科研产出_SCI论文
Corresponding AuthorGao, CJ (reprint author), Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China.
Recommended Citation
GB/T 7714
Gao, CJ,Gong, Y,Wang, X,et al. Cosmological models with Lagrange multiplier field[J]. PHYSICS LETTERS B,2011,702(41308):107-113.
APA Gao, CJ,Gong, Y,Wang, X,Chen, XL,&Gao, CJ .(2011).Cosmological models with Lagrange multiplier field.PHYSICS LETTERS B,702(41308),107-113.
MLA Gao, CJ,et al."Cosmological models with Lagrange multiplier field".PHYSICS LETTERS B 702.41308(2011):107-113.
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